oil AUDI A4 1998 B5 / 1.G APB Engine Valve Gear Service Owner's Guide

15-83


- Prepare shaded areas on double bearing cap -1- and bearing cap -7-.

.... by applying a thin coat of sealant D 454 300 A2 and install bearing
caps (watch position of dowel sleeves).
- Install remaining bearing caps (watch position of dowel sleeves).
- Install new oil feed lines for camshaft bearings.
- Install new oil seals for inlet and exhaust camshafts; installing Page
15
-10
.
- Remove retainer for chain tensioner 3366.
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15-89

- Measure clearance between cam and lifter.

Note:
If irregular valve noise occurs repeatedly during short journeys and
disappears after extended driving, the oil check valves must be replaceed
Page 17
-12
. - Push lifter down with a wooden or plastic wedge. If a 0.20 mm feeler
gauge can then be inserted between camshaft and lifter, replace lifter:
removing and installing camshafts and camshaft adjuster Page 15
-
75

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15-92


Inlet side
Note:
The inlet valves are installed in the cylinder head at different angles. - To prevent damage to the new valve stem seals, place plastic sleeve -
A- on the valve stem.
- Lightly oil sealing lip.
- Insert valve stem seal -B- (without oiling outside of seal) into installing
tool 3129 and carefully push it down onto the valve guide.
- When installing new valves, lightly oil valve stems before installing.

Valve spring compressor 3362 can be set accordingly to two different
positions:
1 - Upper position for center valve
2 - Lower position for the two outer valves
3 - Threads on each side to take M6 x 25 bolts for securing spring
compressor to cylinder head
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15-94


Reworking valves
Valves must not be reworked. Only grinding-in (lapping) is permitted.
WARNING!
Note precautions required when disposing of sodium-cooled
exhaust valves Page 15
-87
. - To prevent damage to new valve stem seals, place plastic sleeve -A-
on valve stem.
- Lightly lubricate sealing lip with oil.
- Insert valve stem seal -B- (without oiling outside of seal) into installing
tool 3365 and carefully push it down onto valve guide.
- When installing new valves, lightly oil valve stems before installing.
Pa
ge 95 of 99 Valve
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g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
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yp
e=re
pair&id=AUDI.B5.GE05.15.1